Application: Chamfer preparation: These burs create a rounded gingival margin, suitable for porcelain-fused-to-metal restoration. 

Diamond bur with perfectly rounded shank made of one piece stainless steel. And consists of a multi-layered diamond grit evenly distributed around the shank. 

Advantages: 

1. Don't bend or break under pressure at high speed. 
   
2. No vibration trauma's and 
3. last much longer.